Climate Insights for Mongaguá

The climate in Mongaguá is warm and mild. The average annual temperature is 23°C and approximately 1484mm of precipitation falls per year. Mongaguá receives a notable amount of rainfall throughout the year, including during its driest month. Mongaguá is in the Southern Hemisphere. The seasons are reversed — summer runs from December to February, while winter falls between June and August. The summer months are: February, January, March. The coldest months are July, August, June, when temperatures can drop to 19°C.

Mongaguá has relatively stable temperatures year-round, staying within a 9°C range. The warmest month is February, when average highs reach 28°C and the mean temperature sits around 26°C. July is the coolest month, with minimum temperatures around 19°C and an average of 20°C. Daily temperature variation is modest, with an average difference of 3°C between highs and lows.

Mongaguá is a fairly wet location, receiving approximately 1484mm of precipitation annually, which averages out to around 124mm per month. The wettest month is February, averaging 190mm of rainfall. March and January also tend to see above-average precipitation. The driest month is July, with just 60mm. That's 130mm less than February, the wettest month. Precipitation varies noticeably between seasons, with the first half (January to June) of the year generally seeing more rainfall.

Mongaguá is relatively calm, with an average annual wind speed of 5km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is October, averaging 6km/h, though still comfortable for most outdoor activities. The calmest conditions occur in February, with average winds dropping to 5km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 1km/h between the calmest and windiest months.

It is currently autumn in Mongaguá, which began on March 20, 2026. Mongaguá is in the Southern Hemisphere, where the seasons are reversed — spring starts in September, summer in December, autumn in March, and winter in June. The warmest period peaks in February at around 28°C, while the coldest stretch bottoms out in July near 19°C. Winter is next, beginning on June 21, 2026 — 12 days from now.

The best time to visit Mongaguá is during July, August and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 20°C with modest rainfall averaging 76mm per month. By contrast, February can be uncomfortably hot with temperatures reaching 28°C. Despite being the best months overall, some rain is still likely — pack a waterproof layer and plan a mix of indoor and outdoor activities.

The table below shows monthly climate averages for Mongaguá based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.